As Americans head to the polls for the midterm elections, Wall Street strategists are predicting how the results will impact the markets. Republican victories may give them control in the House and the Senate, and more gridlock means less legislation is passed. Price volatility is expected to remain high in equity markets through Tuesday night as mail-in ballots are counted. However, no matter the outcome, history shows that the S&P 500 shows a positive return in every one-year period that followed the mid-term elections.